/**
* This program contains integration test for SAPI Tss2_Sys_GetRandom.
* First, this test is checking the return code to make sure the
* SAPI is executed correctly(return code should return TPM_RC_SUCCESS).
* Second, the SAPI is called twice to make sure the return randomBytes
* are different by comparing the two randomBytes through memcmp.
* It might not be the best test for random bytes generator but
* at least this test shows the return randomBytes are differen.
*/
int
test_invoke (TSS2_SYS_CONTEXT *sapi_context)
{
TSS2_RC rc;
TPM2B_DIGEST randomBytes1 = { { sizeof (TPM2B_DIGEST) - 2, } };
TPM2B_DIGEST randomBytes2 = { { sizeof (TPM2B_DIGEST) - 2, } };
int bytes = 20;
print_log("GetRandom tests started.");
rc = Tss2_Sys_GetRandom(sapi_context, 0, bytes, &randomBytes1, 0);
if (rc != TSS2_RC_SUCCESS)
print_fail("GetRandom FAILED! Response Code : %x", rc);
rc = Tss2_Sys_GetRandom(sapi_context, 0, bytes, &randomBytes2, 0);
if (rc != TSS2_RC_SUCCESS)
print_fail("GetRandom FAILED! Response Code : %x", rc);
if(memcmp(&randomBytes1, &randomBytes2, bytes) == 0) {
print_fail("Comparison FAILED! randomBytes 0x%p & 0x%p are the same.", &randomBytes1, &randomBytes2);
}
print_log("GetRandom Test Passed!");
return 0;
}
int getRandom(const char *outFileName, UINT16 bytesRequested)
{
TPM_RC rval;
TPM2B_DIGEST randomBytes;
rval = Tss2_Sys_GetRandom(sysContext, NULL, bytesRequested, &randomBytes, NULL);
if (rval != TSS2_RC_SUCCESS)
{
printf("\n......TPM2_GetRandom Error. TPM Error:0x%x......\n", rval);
return -1;
}
printf("\nGetRandom succ...\n");
printf("byte size: %d\n",randomBytes.t.size);
for(UINT16 i = 0; i < randomBytes.t.size; i++)
printf(" 0x%2.2X",randomBytes.t.buffer[i]);
printf("\n");
if(saveDataToFile(outFileName, (UINT8 *)randomBytes.t.buffer, randomBytes.t.size))
return -2;
return 0;
}
